US3224592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil filter for an internal-combustion engine
Assignee: Individual
•
Filing: 1963-09-04
•
Granted: 1965-12-21
•
Expires: 1983-09-04
Abstract
No abstract record available.
Inventors
- 👤 Robert L Burns
- 👤 Gerald R Van Duzee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:13
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D37/025; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D29/50; B01D29/52; B01D29/54; B01D29/56; B01D29/58; B01D37/03; B01D39/00; B01D39/08; B01D39/083; B01D39/086; B01D39/14; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/0471; B01D2239/06; B01D2239/065; B01D2239/069; B01D2239/0695
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN AN OIL FILTER FOR AN INTERNAL-COMBUSTION ENGINE, A FILTER ELEMENT COMPOSED OF A FIBROUS MATERIAL DISPOSED IN OVERLAPPING LAYERS, AND A COATING OF FINELY DIVIDED MAGNESIUM DISPOSED ON AT LEAST ONE SURFACE OF THE FILTER ELEMENT, SAID MAGNESIUM BEING APPLIED TO SAID FILTER ELEMENT AT SPACED LOCATIONS WHEREBY A PORTION OF SAID SURFACE OF THE FILTER ELEMENT IS COATED WITH THE MAGNESIUM AND THE SECOND PORTION OF SAID SURFACE OF THE FILTER ELEMENT IS EXPOSED AND THE LOCATIONS OF MAGNESUIM BEING SUBSTANTIALLY OUT OF DIRECT ALIGNMENT IN ADJACENT OVERLAPPING LAYERS.
Claim 2
Dependent Claim
91 words
IN AN OIL FILTER FOR AN INTERNAL-COMBUSTION ENGINE, A FILTER ELEMENT COMPOSED OF A FIBROUS MATERIAL DISPOSED IN OVERLAPPING LAYERS, AND A COATING OF FINELY DIVIDED MAGNESIUM DISPOSED ON AT LEAST ONE SURFACE OF THE FILTER ELEMENT, SAID MAGNESIUM BEING APPLIED TO SAID FILTER ELEMENT AT SPACED LOCATIONS WHEREBY A PORTION OF SAID SURFACE OF THE FILTER ELEMENT IS COATED WITH THE MAGNESIUM AND THE SECOND PORTION OF SAID SURFACE OF THE FILTER ELEMENT IS EXPOSED AND THE LOCATIONS OF MAGNESUIM BEING SUBSTANTIALLY OUT OF DIRECT ALIGNMENT IN ADJACENT OVERLAPPING LAYERS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |